Vacuum tank



April 27, 1926.

T. J. MGCARTHY VACUUM TANK FledAugust 11l 1924 Patented Apr. 27,`r19263'.

UNITED STATES PATENT orifice.

THOMAS J. MCCARTHY, oF Los Antennas, CALIFORNIA.

VACUUM TANK.

Application filed August 11, 1924. Serial No. 731,445.

vracuuin Tanks, of which the following is av Liecitication.V

This invention relates to vacuuni tanks,l and consists ot the novelfeatures herein shown, describediand claimed. p

The leadin object is to ineke a vacuuin tank in which the valves snapopenand snap shut so as to inake positive action.

Another object is to improve and siinplii'f,Y

the deta.' ls ot construction oi? a vacuun'i tank .tor use in supplyingfuel to the engines ot inotor vehicles and the like.

Other objects and advantages will appear troni the drawings andspecitication.

The drawings illustrate the construction.

and operation of a vacuum tank embodying the principles ot' myinvention.

Figure 1 is a top plan view as indicated by the arrow 1 in Fig. 2.

Fig. 2 is a sectional elevation on the line 2m?. of Fig. 1 and lookingin the direction indicated by theV arrows, the parts being shown inposition with the float elevated and with the ventopen, as when thereisplenty ot gasoline in the tank. n

Fig. 3 is a view analogousto Fig. 2 with the float down and vent closedand the other valves open as when drawing gasoline troni the supply tankby the suction ot' the engine.

Fig. 4 is a top plan view analogous to Fig. 1 with the cap reinoved toshow the inechanism.

Fig. 5 is an enlarged detail ot one Vof the valve operating levers.

Fig. 6 is a sectional detail` on the line 6 6 of F ig. 5.

rlhe 'details of construction and operation shown in the drawings are asfollows:

The tank body 1 is a straight cylinder closed at its lower end by a cap2 and at 4its upper end by a cap 3. A nipple 4 extends downwardly tronithe 1center ol' the cap 2 and the feed pipe 5 leading to the carburetoris connected to the nipple 4 by a union nut 6.

An inlet fitting 7 has a nipple 8 and vis mounted inside of the cylinder1 near the top with the nipple 8 extending outwardly through the wall ofthe cylinder. The supply pipe 9 leading from the supply tank is 24 .islined in the upper outer valve seat 15. A1 y y 4nected to the outer endot the lever 33 and yengages a valveseat 21.

connected to the nipple 8 by a union nut 10. A port 11 leads troni thekpipe 9 through the nipple 8 to a vertical port 12. The port 12 leadsfrom they upper end of the tting T downwardly past the port 11 and formsa settling basin 18 having a cleanout plug 14 atits lower end. Theupperend ot the port 12 is linished toforin a valve seat 15.

The suction valve fitting 15 has a inain body tltting inside of theshell 1 and a nipple 17 extending through the shell. A- vsuce ktion pipe18 is connected to the nipple 17 by a union nut 19 andthe suction pipeis to be connected to the engine in tlieusual way. i valve seat E20 isformed at the top ot the fitting ,1G inside ot the tank and a port 21leads downwardly and outwardly to communicate with the pipe 18. A valveseat is formed from tlie'lower end of the litting 16 and a port 23extends upwardlyk and outwardly, and an elbow shaped tube end ont theport 23 to torni a vent.

Bearing arins 25 and .26 entend upwardly and downwardly frointhe itting7. Levers 2T and 28 are pivotally `connected to the ends'of the arnisand 26 andare pivotally connected to the iioat stein 29. A bracketextends inwardly trointhe Alitting 1G and the stein 29 vslides freelythrough the bracket at the axial Centeroltlie tank y1. Bearings 31 andXtend inward-ly troni the fitting 16 and levers 83 and 34 are pivotallyconnected to the bearings 31 andl and to the stein 29. An inlet valve isconnected to the outer endet the lever 27 to engage the suction valvek36 is con- A vent valve Si is connected to the youter end ot thelever34. l rages the valve seat Q2. The parts are adjust d and arranged'so that when the valves and 3G are closed the valve 37 is. opened andvice versa. The levers 27, 33 and 34 are constructed as shown in Figs. 5and G. y

Atlat end 38 has pivothole 39 for connection to a support and a pivothole 40 for connection to a valve.` A llange 41 is formed at theopposite end of the flat end 38 from the pivot hole 4.0 and forms aspring seat.

A socket 42 extends troni the head 41, a

coil spring r43 lits upon the socket 42 against the head 41, a secondflat end 44 has a plvot hole 45 for connection to the stern 29, a headl-(S is termed integral with the end al, and a shank 47 slides into thesocket Ll2 with the spring t3 against the head 46, said head t6 servingas a spring seat, the object being to make an expansion lever. The lever28 is the same as the other levers with the exception that it dees notconnect to a valve and simply serves as an equalizer` to keep the stem29 straight. The parts are set so that when the stein 29 goes upcarrying the levers past a horizontal dead center the tension et' thesprings r3.will snap the stem 29 upwardly and snap the valves 35 and 36closed and snap the valve 37 open, and likewise when the stein 29 goesdown past the dead center the tension of the springs will snap the ventvalve 37 closed and the valves 35 and 3G open.

The lio-at 8 lits loosely in the tank l and has a central bearing 49.The stem 29 eX- tends loosely through the bearing 49. A pin 5() is linedthrough the stem above the iloat and a pin 5l is lined through the stembelow the lloat, there being considerable lost inotion between the floatand the pins. 'Vhen the fioat 48 goes up against the pin 5G, continuedrise in the gasoline level in the tank 'l will raise the ioat to raisethe stem 29 until the valves 35 and 36 snap sluit and the valve 37 snapsopen. Then the tank will continue to supply fuel to the carburetor untilthe gasoline goes down carrying the float 48 downwardly until the floatengages the pin 5l, and continued downward movement of the Heat willmove the stem 29 downwardly until the valves 35 and 36 snap open and thevalve 37 snaps shut. Then continued action of the engine will cause asuction through the pipe 18 to draw gasoline through the pipe 9.

A removable plug 52 is mounted in the cap 3 to be mounted in the cap 3to be reioved in priming the tank to start the engine.

Thus I have produced a vacuum tank in which all the valves are mountedupon expansion levers in parallel planes, the levers being connected toa float controlled stem so that when the float goes up or down thevalves will snap open or closed.

The bracket 3G has two arms 30a and spaced a reasonable distance apart.An

pansive spring 30c is mounted upon 'the arm 3()b around the stem 29 anda pin 30d is inserted through the stem 29 above the spring so that thetension et the spring 30C will be exerted to raise the stem 2t) andassist in the snap action in closing the valves 35 and 36 at the propertime.

Various changes may be made without departing from the spirit of theinvention.

I claim:

l. A vacuum tank having inlet valve mechanism, suction valve mechanismand feed valve mechanism, each o'f the valves being mounted uponexpansion levers in parallel planes, a stem to which the levers a reconnected. and av float having unrestrieh ed lostmotion connection withthe stem, the expansion levers each comprising two ends, telescopicmeans for connecting the ends, and an expansion spring tendingI to torcethe ends apart, so that when the ioat operates the stem to move thelevers either way past the dead center the valves will snap closed oropen.

2. In a vacuum tank, a tank construction, inlet valve mechanism mountedin the tank at one side, a suction valve mechanism mounted in the tankdiainetrically opposite the inlet valve mechanism, a ven valve mechanismmounted in line with the suction valve mechanism, a stein mounted at theaxial center of the tank, expansion levers connected to the stein andcarrying valves for the three valve mechanisms, and a fourth expansionlever co-operating with the inlet valve expansion lever to balance thepressure upon the stem.

3. In a vacuum tank, a suction valve mec-hanism having a valve seat atits top, a vent valve mechanism in line with the suction valve mechanismand having its seat at the bottom, expansion levers pivotally mountedand carrying valves for the valve seat, and a stem connect-ing theepansion lever so that when the stem goes up the suction valve is closedand the vent valve open and when the stem goes down the suction valve isopen and the vent valve closed.

In testimony whereoin I have signed my name to this specilication.

THOMAS J. ilIcCr-XR'IHY.

